Looking for an HMR to convert the value in header X-Vz-Auth-ID to Hex and add it to the User-to-User

INVITE sip:1234567@customer:5060;transport=tcp SIP/2.0
Via: SIP/2.0/TCP 127.0.0.1:5060;branch=z9hG4bK936mv020dgipmabtlgk0.1
Allow: INVITE, ACK, BYE, OPTIONS, CANCEL, SUBSCRIBE, REFER
Content-Length: 327
Max-Breadth: 60
Contact: <sip:+19876543210@127.0.0.1:5060;sipappsessionid=app-w32s4a4zgf1u;wlssfcid=sip-1hbb55aeud0gx;transport=tcp>
Max-Forwards: 68
From: <sip:+19876543210@127.0.0.1:5060;user=phone>;tag=90e74681
Content-Type: application/sdp
X-Vz-Auth-Id: E211BFB8-284E-48CC-A023-DB602ED10CA7
To: <sip:1234567@customer
Accept-Encoding:
Cisco-Guid: 1384793008-0032155073-2353987592-0631536160
User-to-User: 04C81D3135313231343036393133353039363230323030363033313432303434
Supported: uui
Referred-By: <sip:8005551212@127.0.0.2:5060>;transport=UDP

v=0
s=-
c=IN IP4 127.0.0.1
t=0 0
m=audio 10000 RTP/AVP 18 0 8 101
a=ptime:20
a=sqn: 0
a=rtpmap:18 G729/8000
a=fmtp:18 annexb=no
a=rtpmap:0 PCMU/8000